Bug: Unused area at bottom with tabs

I'm using rio with tabs and noticed that sometimes new tabs will have unused area at the bottom. Not every tab has it. If one tab in a window has it, the space will also exist for new tabs in the same window. Sometimes new tabs increase the unused area. New windows will not be affected if the problem exists in a different window, but they can run into the same problem. Unfortunately I've not yet managed to get steps for a reliable reproduction. Experienced with rioterm 0.5.27 The following screenshots are from the same window, all running the same command (`cat .../README.md`) and show that the bottom area is increasing. The last two tabs have the same amount of unused area at the bottom. Screenshots